SEASON PREMIERE: Season 2 of this Netflix sci-fi series, about time-travelers from the future who visit the past by inhabiting the bodies and consciousness of others, begins at a disturbing place and time: on 9/11, inside the Twin Towers. It’s done to introduce a new character (played by Enrico Colantoni), villain and story line for the new season – but that opening scene is a little rough. And even for a time-travel series, maybe a bit too soon…